CN111959307A

CN111959307A - Charging module and electric automobile

Info

Publication number: CN111959307A
Application number: CN202010671556.9A
Authority: CN
Inventors: 顾师达; 张维; 梁涛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Electric Technology Co ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2020-11-20
Anticipated expiration: 2040-07-13
Also published as: CN111959307B

Abstract

The application provides a charge module and electric automobile that awaken reliability higher and the consumption is lower of awakening up to charge. The charging module comprises a charging interface, a charging guide circuit and a charger. The charging interface is used for connecting power supply equipment and comprises a power supply connecting end, a CP signal transmission end and a CC signal transmission end. The power connection end is used for transmitting a first charging power supply provided by the power supply equipment, the CP signal transmission end is used for transmitting a CP signal, and the CC signal transmission end is used for transmitting a CC signal. The charger is connected with the charging interface and the charger to charge the energy storage module according to the first charging power supply. The charge guiding circuit comprises a CP wake-up circuit and a CC wake-up circuit. The CP awakening circuit awakens the charger from a standby state when the charging interface is connected with the power supply equipment according to the received CP signal, and the CC awakening circuit awakens the charger from the standby state when the charging interface is connected with the power supply equipment according to the received CC signal.

Description

Charging module and electric automobile

Technical Field

The application relates to the field of charging, especially relates to a be applied to electric automobile's module of charging.

Background

Electric automobile fills battery charging outfits such as electric pile through charging the rifle connection to carry out the alternating current-direct current to the energy storage battery among the electric automobile and charge. The vehicle-mounted charger is arranged in the electric automobile to charge the energy storage battery according to the alternating current and direct current power supply provided by the charging equipment. In the charging process, alternating current and direct current charging control guidance needs to be performed through the alternating current and direct current charging control guidance circuit according to the connection state of the charging equipment and the vehicle-mounted charger and the charging state of the energy storage battery. The purpose of AC/DC charging control guidance is to ensure charging connection between the electric automobile and the charging equipment through a guidance circuit, so that the electric automobile can be charged safely and reliably. The basic functions of the control guide circuit according to the corresponding national standard requirements comprise: the charging interface guidance of the alternating current charger is met; the charging interface guidance of the direct current charger is met; low power consumption standby can be realized; the power failure is delayed. However, in the actual use process, when the electric vehicle is connected with the charging pile through the charging gun, the reliability of the vehicle-mounted charger awakened by the alternating current/direct current charging control guide circuit is poor.

Disclosure of Invention

In order to solve the foregoing technical problem, an embodiment of the present application provides a charging module with a charging guiding circuit and an electric vehicle including the charging module, wherein the charging module has high wake-up reliability.

In a first aspect, the present application provides a charging module, which includes a charging guide circuit, a charging interface and a charger, wherein the charging interface is used for connecting a power supply device and includes a power connection terminal, a CP signal transmission terminal and a CC signal transmission terminal, wherein the power connection terminal is used for transmitting a first charging power provided by the power supply device, the CP signal transmission terminal is used for transmitting a CP signal for controlling a working state of the charger, the CC signal transmission terminal is used for transmitting a CC signal indicating whether the charging interface is connected to the power supply device, the charger is used for charging an energy storage module according to the first charging power, the charging guide circuit is connected to the charging interface and the charger, and the charging guide circuit includes a CP wake-up circuit and a CC wake-up circuit, wherein, the CP awakening circuit awakens the charger from a standby state when the charging interface is connected with the power supply equipment according to the received CP signal; and the CC awakening circuit awakens the charger from a standby state when the charging interface is connected with the power supply equipment according to the received CC signal. In this embodiment, except that the CP wake-up circuit and the CP wake-up circuit can both provide the wake-up signal, the accuracy and reliability of the charger being woken up are effectively improved.

In an embodiment of the present application, the charge steering circuit further includes a CC resistance side circuit, a CP voltage measuring circuit, a CP duty ratio measuring circuit, and a CP charge control circuit. The CC resistance value measuring circuit is used for measuring the earth resistance value of a CC signal transmission end, judging the connection state of the charging interface and the power supply equipment according to the earth resistance value, and determining the rated capacity of a cable of a charging connection device connected between the charging interface and the power supply equipment. And the CP voltage measuring circuit is used for judging the connection state of the charging interface and the power supply equipment. The CP duty ratio measuring circuit is used for measuring the duty ratio of a PWM signal in the CP signal, the duty ratio of the PWM signal represents the maximum power supply capacity of the power supply equipment, and the duty ratio of the PWM represents the first charging power supply capacity output by the power supply equipment. The CP charging control circuit is used for informing the power supply equipment that a charger is ready to finish, applying for stopping charging to the power supply equipment and responding to a charging stopping instruction sent by the power supply device. Through the arrangement of the CC resistance value side circuit, the CP voltage measuring circuit, the CP duty ratio measuring circuit and the CP charging control circuit, the safety and the reliability of the charger during charging are effectively improved.

In an embodiment of the present application, the CC wake-up circuit includes a first normal power supply, a CC wake-up switch element, a CC current-limiting resistor, and a CC delay capacitor. The CC awakening switch element comprises a second control end, a third connecting end and a fourth connecting end, the CC awakening switch element is in a conducting state or a stopping state under the control of voltage received by the second control end, and when the CC awakening switch element is in the conducting state, the third connecting end and the fourth connecting end are electrically conducted; and when the CC awakening switch element is in a cut-off state, the third connecting end and the fourth connecting end are electrically disconnected. The second control end of the CC awakening switch element is connected with the CC signal transmission end through a CC divider resistor and a CC delay capacitor which are sequentially connected in series and used for receiving a CC signal, the third connection end is connected with a first normal power supply, the CC current-limiting resistor is connected with the CC delay capacitor in parallel and used for providing a discharge loop for the CC delay capacitor, and the fourth connection end is connected with the awakening signal output end. When the charging interface is connected with the power supply equipment, the CC signal transmission end is connected with a grounding end, the CC awakening switch element is in a conducting state, and the first normal power supply outputs a positive pulse awakening signal through a fourth connecting end of the CC awakening switch element. The CC awakening circuit outputs the awakening signal accurately and timely through the connection state of the CC signal transmission end.

In an embodiment of the present application, the CC wake-up circuit further includes a CC on-resistance, the CC on-resistance is connected between the first normal power supply and the CC delay capacitor, when the CC wake-up switch element is in an on state, the first normal power supply charges the CC delay capacitor through the CC on-resistance, when a voltage obtained after the CC delay capacitor is charged is greater than a preset value, the CC wake-up switch element is in an off state, and the CC wake-up circuit stops outputting the wake-up signal. The output duration of the wake-up signal is accurately controlled through the charging voltage of the CC delay capacitor, and the output accuracy of the wake-up signal is ensured.

In an embodiment of the present application, when the charging interface is disconnected from the power supply device, the CC signal transmission terminal is disconnected from the ground terminal, the CC wake-up switch element is in a cut-off state, and the CC delay capacitor discharges through the CC current-limiting resistor. With the cut-off of the second switch element, the CC delay capacitor discharges through the CC current-limiting resistor, and the CC current-limiting resistor has larger resistance value, so that the leakage current in the CC awakening circuit is very small, and the power consumption of the system during sleep is effectively reduced.

In an embodiment of the present application, the CP wake-up circuit includes a CP wake-up resistor, a CP wake-up capacitor, a second diode, and a fourth diode, and the CP wake-up resistor, the CP wake-up capacitor, and the fourth diode are sequentially connected in series between a CP signal terminal and a wake-up signal output terminal. The positive pole of the fourth diode is connected to the CP wake-up capacitor, the negative pole of the second diode is connected to the wake-up signal output end, the positive pole of the second diode is connected to the grounding end, the negative pole of the second diode is connected to any node between the CP wake-up capacitor and the fourth diode, and the PWM signal in the CP signal is transmitted to the wake-up signal end through the CP wake-up resistor, the CP wake-up capacitor and the fourth diode to form a positive pulse wake-up signal. The CP wake-up circuit accurately and timely outputs a wake-up signal through a CP signal transmitted by a CP signal end.

In an embodiment of the present application, the wake-up signal output end is further connected to a filter circuit formed by a fifth capacitor and a ninth resistor, and the fifth capacitor and the ninth resistor are connected in parallel between the wake-up signal output end and the ground end, and are configured to perform filtering on the wake-up signal. The filter circuit formed by the fifth capacitor and the ninth resistor accurately filters the wake-up signal so as to effectively filter interference signals in the wake-up signal, and further ensure the accuracy of the wake-up signal.

In an embodiment of the present application, the CC resistance measurement circuit includes a first resistor, a second resistor, a third resistor, a first capacitor, and a first switch element, where the first resistor, the second resistor, and the first capacitor are sequentially connected in series between a first auxiliary power end and the ground end, the first switch element includes a first control end, a first connection end, and a second connection end, the first switch element is in a conducting state or a blocking state under control of a voltage received by the first control end, and when the first switch element is in the conducting state, the first connection end and the second connection end are electrically connected; when the first switch element is in a cut-off state, the first connection end and the second connection end are electrically disconnected, the first control end of the first switch element is connected to the first auxiliary power end through the third resistor, the first connection end is connected to any one node between the first resistor and the second resistor, the second connection end is connected to the CC signal transmission end, when the charger is awakened, the first auxiliary power end loads a first auxiliary power supply, the first auxiliary power supply controls the first switch element to be in a conducting state, a cable of the charging connection device is connected to the first auxiliary power end through the CC signal transmission end and the first resistor, wherein voltage which is obtained by the cable of the charging connection device from the first auxiliary power supply is filtered through the second resistor and the first capacitor and then is output from the CC voltage measurement end as a CC resistance signal, the CC voltage measuring end is connected to a node between the second resistor and the first capacitor. The CC resistance value measuring circuit accurately identifies the rated capacity of the cable providing the first charging power supply through detection of voltage in the CC signal, so that the charger accurately controls the charging current for the energy storage module, the charging current output to the energy storage module is prevented from exceeding the rated capacity of the cable, and the safety of the cable in the charging process is ensured.

In an embodiment of the present application, the CP voltage measurement circuit includes a CP measurement steering diode, a CP voltage measurement voltage division resistor, a CP voltage measurement filter resistor, and a CP voltage measurement filter capacitor. The CP voltage measurement guide diode, the CP voltage measurement divider resistor and the CP voltage measurement filter resistor are sequentially connected in series between the CP signal connection end and the grounding end, and the CP voltage measurement filter capacitor and the CP voltage measurement filter resistor are connected in parallel between the CP voltage measurement end and the grounding end. The CP signal is divided by the CP voltage measuring voltage dividing resistor, and the CP voltage measuring filter resistor and the CP voltage measuring filter capacitor are filtered to be used as a CP voltage measuring signal to be output from the CP voltage measuring end, wherein the CP voltage measuring end is connected to any node between the CP voltage measuring voltage dividing resistor and the CP voltage measuring filter resistor. By measuring the voltage in the CP signal, whether the charging interface is connected with the power supply equipment can be accurately judged.

In an embodiment of the application, the CP duty ratio measuring circuit includes a CP duty ratio measuring voltage dividing resistor, a CP duty ratio measuring control resistor, a CP duty ratio measuring reference resistor, a CP duty ratio measuring control switching element, and a CP duty ratio measuring filter capacitor. The CP duty ratio measurement voltage-dividing resistor and the CP duty ratio measurement control resistor are connected in series between the cathode of the CP measurement guide diode and the grounding end, and the anode of the CP measurement guide is electrically connected to the CP signal end. The CP duty ratio measurement control switch element is connected with the CP duty ratio measurement divider resistor, the grounding end and the CP signal duty ratio output end. And the CP signal duty ratio output end is connected to a second auxiliary power supply end through the CP duty ratio measurement reference resistor. And the CP duty ratio measuring filter capacitor is connected between the CP signal duty ratio output end and the ground end GND. And when the CP duty ratio measurement control switch element is in the on state, the second auxiliary power supply performs level conversion with the CP duty ratio measurement reference resistor through the CP duty ratio measurement control switch element, and transmits the converted signal to the CP signal duty ratio output end as a CP duty ratio measurement signal after being filtered by the CP duty ratio measurement filter capacitor, wherein the CP duty ratio measurement signal represents the duty ratio of the PWM signal. The duty ratio of the CP signal can be determined through the CP duty measurement signal, so that accurate measurement of the duty ratio of the PWM signal in the CP signal is achieved, and therefore capacity information of the power supply equipment about the charging voltage and the charging current can be accurately determined.

In an embodiment of the application, when the energy storage device is charged and the charging interface is connected to the power supply device, the CP signal connection end stops outputting the CP signal of the PWM signal and outputs a high-level CP signal to stop outputting the wake-up signal, the charger is in a sleep state, the first auxiliary power source end and the second auxiliary voltage end stop outputting the first auxiliary power source and the second auxiliary power source, the first normal power source is connected to the CC signal transmission end through the CC wake-up switch element and the CC current-limiting resistor, and the CC current-limiting resistor is configured to limit a current in the CC wake-up circuit. When the energy storage module in the energy storage device is charged, the output of the wake-up signal is stopped so that the charger is in a standby state, the auxiliary power supply is turned off, and meanwhile, the CP wake-up circuit carries out current limiting through the CC current-limiting resistor, so that the power consumption of the charging system during sleep is effectively reduced.

In a second aspect, an implementation of the present application provides an electric vehicle including an energy storage module and the aforementioned charging guiding circuit, so that the electric vehicle is accurate and safe during charging, and has low power consumption in a standby state after charging is completed.

Drawings

Fig. 1 is a schematic diagram of a connection structure of a charging system in the prior art;

FIG. 2 is a schematic structural diagram of the second connection interface shown in FIG. 1;

FIG. 3 is a schematic structural diagram of the charging interface shown in FIG. 1;

fig. 4 is a schematic circuit connection structure diagram of a charging system in the prior art;

fig. 5 is a schematic circuit connection structure of a charging system according to an embodiment of the present disclosure;

FIG. 6 is a block circuit diagram of the charge steering circuit shown in FIG. 5;

fig. 7 is a schematic diagram of a specific circuit structure of the charge steering circuit shown in fig. 6.

Detailed Description

Please refer to fig. 1, which is a schematic diagram of a connection structure of a charging system 10 in the prior art. As shown in fig. 1, the charging system 10 includes a charging device 10a, a charging connection device 10b, and an energy storage device 10c, wherein the charging connection device 10b is connected to the charging device 10a and the energy storage device 10 c.

The charging device 10a includes a power supply interface In1, and the power supply interface In1 is used for outputting a first charging power. In this embodiment, the charging device 10a is a charging pile, and the first charging power source may be a single-phase ac power source or a three-phase ac power source.

The charging connection device 10b is used for transmitting a first charging power to the energy storage device 10c to charge the energy storage device 10c for energy storage. The charging connection device 10b includes a first connection interface Cn1 and a Cable second connection interface Cn2, wherein the Cable is connected between the first connection interface Cn1 and the second connection interface Cn 2. The first connection interface Cn1 is connected to the power supply interface In1, and is configured to receive a first charging power source, and the Cable transmits the first charging power source to the second connection interface Cn 2. In this embodiment, the charging connection device 10b may be a charging gun.

The energy storage device 10c includes an energy storage module and a charging interface In2, the charging interface In2 is used for being connected with the second connection interface Cn2 to receive the first charging power through the charging connection device 10b, and the energy storage module receives the first charging power from the second connection interface Cn2 and stores electric energy. In this embodiment, the energy storage device may be a rechargeable energy storage battery in an electric vehicle.

Referring to fig. 2 to fig. 3, fig. 2 is a schematic structural diagram of the second connection interface shown in fig. 1, and fig. 3 is a schematic structural diagram of the charging interface shown in fig. 1.

As shown In fig. 2 to fig. 3, the second connection interface Cn2 and the charging interface In2 each include 7 connection ends, where the connection ends corresponding to the symbols In fig. 2 and fig. 3 are:

link L1 ~ link L3 are three-phase alternating current power supply link, and link N is the ground connection link, and link PE is the ground connection link, and wherein, link L1 ~ link L3, link N and link PE are used for the first charging source of cooperation transmission. The Connection terminal CC (Connection confirmation, CC) is a charging confirmation Connection terminal, and the Connection terminal CP (Control pilot, CP) is a Control guidance Connection terminal. The connecting end CC and the connecting end CP are used for transmitting a control signal of a connection state of the second connection interface Cn2 and the charging interface In 2.

Please refer to fig. 4, which is a schematic circuit connection structure diagram of a charging system 10 in the prior art. As shown in fig. 4, the power supply apparatus 10a includes a power supply control device 111, a leakage protection circuit 112, a first switch module K1, a second switch S2, and a first detection point Te 1.

The power supply control device 111 is connected to the first detecting point Te1 through the second switch S2, and is configured to selectively output a 12V first fixed voltage or a Pulse Width Modulation (PWM) signal to the first detecting point Te 1.

The first connection interface Cn1 is connected to the power supply interface In1 to form a power supply interface, and the charging interface In2 is connected to the second connection interface Cn2 to form a vehicle interface.

The electric vehicle 12 includes a vehicle charger 121, a vehicle control device 122, a second detection point Te2, a third detection point Te3, a second resistor R2, and a third resistor R3.

In this embodiment, the charging socket In1 is the power supply interface In1 shown In fig. 1, the charging plug Cn1 is the first connection interface Cn1 shown In fig. 1, the vehicle-mounted plug Cn2 is the second connection interface Cn2 shown In fig. 1, and the vehicle-mounted socket In2 is the charging interface In2 shown In fig. 1.

In the present embodiment, an electric vehicle 10c is used as the energy storage device 10c shown in fig. 1. Therefore, when the energy storage device 10c is another terminal device, the vehicle-mounted charger may also be a charger of another device. The charging plug Cn1 and the vehicle-mounted plug Cn2 form two connection interfaces of the charging connection device 10b (charging gun), the charging plug Cn1 and the vehicle-mounted plug Cn2 are connected through a conductive Cable, and a Cable between the charging plug Cn1 and the vehicle-mounted plug Cn2 is a conductive Cable of the charging gun. The power supply interface In1 and the charging plug Cn1 form a power supply interface on the charging device 10a side, and the vehicle-mounted plug Cn2 and the vehicle-mounted socket In2 form a vehicle interface on the electric vehicle 10c side.

According to the national standard GB/T18487.1-2015: part 1 of an electric vehicle conduction charging system: general requirements, when the ac charging system operates in the "charging mode 2 connection mode B" shown in fig. 4, the working flow of the charging control guidance circuit is as follows:

a first step 1 in which the vehicle Control device 122 measures whether or not a 12V Control Pilot (CP) signal is present at the detection point 2; if so, marking that the vehicle plug is connected with the vehicle socket, and controlling the guide circuit to be activated to enter a working state; if not, the steering circuit is controlled to be in a standby state.

In the second step 2, the vehicle control device judges whether the vehicle plug and the vehicle socket are completely connected or not by measuring the resistance value between the detection point 3 and the PE. When half-connection is carried out, S3 is disconnected, and the resistance between the detection point 3 and the PE is RC + R4; when the connection is completed, S3 is in a closed state, and the resistance value between detecting point 3 and PE is RC. In addition, R4 and RC are also used to characterize the charging cable capacity. The detection point 3 and the PE are connected by a Connection Confirm (CC) signal line.

And 3, judging whether the R3 is connected or not by measuring the voltage of the detection point 1 by the power supply control device, delaying for a certain time if the R3 is connected, and switching the S1 to a PWM output state.

And step 4, the vehicle detection device judges whether the charging device is completely connected or not by measuring the PWM signal of the detection point 2. If fully connected, switch S2 is closed and the vehicle enters a ready state.

And a fifth step 5, the power supply control device judges whether the vehicle enters a ready state or not by further measuring the voltage of the detection point 1, and if the vehicle enters the ready state, the K1 and the K2 are closed, and the alternating current power supply loop is conducted.

And a sixth step 6, the vehicle control device confirms the maximum power supply capacity of the power supply equipment by measuring the duty ratio of the PWM signal at the detection point 2, determines the output current of the vehicle-mounted charger according to the maximum power supply capacity, and starts the charging process.

It is found that, in the charging system 10 shown in fig. 4, only the CP signal has the wake-up function, and the CC signal does not have the wake-up function, so that the reliability of wake-up of the charging system 10 is poor. In addition, when the charging device 10a is connected to the energy storage device 10c through the charging connection device 10b, but the energy storage device 10c is already charged, the resistors R1-R4 on the CP signal transmission line and the CC signal transmission line are still in the energy consumption state, so that the standby power consumption of the charging system 10 is large.

Please refer to fig. 5, which is a schematic diagram of a circuit connection structure of a charging system 20 in an embodiment of the present application, wherein the charging system 20 has a circuit structure substantially similar to that of the charging system 10 shown in fig. 4, and the difference is that the charging system 20 further includes a charging pilot circuit 100, and the charging pilot circuit 100 is configured to receive a CC signal and a CP signal, process the CC signal and the CP signal, and transmit the CC signal and the CP signal to a vehicle control device, so as to accurately wake up the vehicle-mounted charger for charging, so that the vehicle-mounted charger is higher in wake-up reliability, and can be in a standby state after charging is completed.

In this embodiment, the vehicle socket In2, the vehicle-mounted charger, the vehicle control device, the charging guidance circuit 100, and other auxiliary circuit elements form the charging module 2, and the charging module 2 and the energy storage module are electrically connected to the energy storage module and used for charging the energy storage module with power. Wherein, the energy storage module is a rechargeable energy storage battery. The circuit structures and the working principles of the vehicle socket In2, the vehicle-mounted charger, and the vehicle control device are the same as those of the corresponding functional modules In the charging system 10 shown In fig. 4, and are not described again In this embodiment. Please refer to fig. 6 for a specific circuit structure of the charge steering circuit 100.

Specifically, please refer to fig. 6, which is a circuit block diagram of the charge steering circuit 100 shown in fig. 5.

As shown in fig. 6, the charge steering circuit 100 includes a CC resistance side circuit 101, a CP voltage measurement circuit 102, a CP duty ratio measurement circuit 103, a CP wake-up circuit 104, a CC wake-up circuit 105, and a CP charge control circuit 106.

The CC resistance value measuring circuit 101 is configured to measure a resistance value to ground of the CC signal line, determine a connection state between the charging connection device 10b and the power supply socket In1 of the power supply apparatus 10a and the vehicle socket In2 of the electric vehicle 10c In fig. 5 according to the resistance value, and determine a rated capacity of the conductive cable In the charging connection device 10 b. The charging current of the vehicle-mounted charger can be controlled to be not more than the rated current which can be transmitted by the connecting cable according to the rated capacity of the conductive cable, which corresponds to the rated current transmitted by the conductive cable.

The CP voltage measuring circuit 102 is used to determine the connection state of the charging connection device 10 b.

The CC resistance value measuring circuit 101 and the CP voltage measuring circuit 102 can determine the connection state of the charging connection device 10b with the power supply socket In1 of the power supply equipment 10a and the vehicle socket In2 of the electric vehicle 10c through the measurement of the current and the voltage.

The CP duty ratio measuring circuit 103 is used to measure the duty ratio of the PWM wave in the CP signal to determine the maximum power supply capability of the power supply device.

The CP wake-up circuit 104 wakes up the charger from the standby state when the charging connection device 10b is just connected according to the received CP signal.

The CC wake-up circuit 105 wakes up the charger from the standby state when the charging connection device 10b is just connected according to the received CC signal.

The CP charging control circuit 106 is used for informing the power supply device that the vehicle-mounted charger in the electric vehicle 10c is ready to be completed to confirm charging, applying for stopping charging to the power supply device 10a, and responding to a charging stop instruction from the power supply device.

More specifically, please refer to fig. 7, which is a schematic diagram illustrating a specific circuit structure of the charge steering circuit 100 shown in fig. 6.

As shown in fig. 7, the CC resistance measurement circuit 101 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, and a first switching element Q1.

The first resistor R1, the second resistor R2 and the first capacitor C1 are sequentially connected in series between the first auxiliary power source terminal and the ground terminal GND. In this embodiment, the first auxiliary power source terminal is a 12V auxiliary power source (12V auxiliary source).

The first switch element Q1 includes a first control terminal (not labeled), a first connection terminal (not labeled), and a second connection terminal (not labeled), the first switch element Q1 is in a conducting state or a blocking state under the control of the voltage received by the first control terminal, and when the first switch element Q1 is in the conducting state, the first connection terminal and the second connection terminal are electrically conducted; when the first switching element Q1 is in the off state, the first connection terminal and the second connection terminal are electrically disconnected.

A first control terminal of the first switching element Q1 is connected to the first auxiliary power source terminal through a third resistor R3, and a first connection terminal is connected to any one node between the first resistor R1 and the second resistor R2; the second connecting end is connected to the CC signal line and used for receiving the CC signal.

The CC voltage measuring terminal is electrically connected to any node between the second resistor R2 and the first capacitor C1.

The CC wake-up circuit 105 includes a first normal power supply, a CC wake-up switch Q2, a CC on resistor R4, a CC voltage divider resistor R5, a CC current limiting resistor R6, a CC delay capacitor C2, a CC pass capacitor C4, a first diode D1, and a fifth diode D5.

The CC wakes up the second control end (not labeled), the third connection end (not labeled) and the fourth connection end (not labeled) of the switching element Q2, the second switching element Q2 is in the on-state or the off-state under the control of the voltage received by the second control end, and when the second switching element Q2 is in the on-state, the third connection end and the fourth connection end are electrically connected; when the second switching element Q2 is in the off state, the third connection terminal and the fourth connection terminal are electrically disconnected.

A second control terminal of the second switching element Q2 is connected to a CC signal line through a CC divider resistor R5 and a CC delay capacitor C2 connected in series in sequence, for receiving a CC signal.

The third connection terminal is connected to a first normal power supply, which is a 12V battery power supply in this embodiment. The fourth connection terminal is connected to the CC transmission capacitor C4, and the CC on-resistance R4 is connected between the second control terminal and the third connection terminal.

The CC current limiting resistor R6 is connected in parallel with the CC delay capacitor C2 and is used for providing a discharge loop for the CC delay capacitor C2. In this embodiment, the resistance of the CC current limiting resistor is much larger than the resistance of the CC voltage dividing resistor R5 and the CC on-resistance R4.

The CC transmitting capacitor C4 is connected to the wake-up signal output terminal through a fifth diode D5, wherein an anode of the fifth diode D5 is connected to the CC transmitting capacitor C4, and a cathode of the fifth diode D5 is connected to the wake-up signal output terminal.

An anode of the first diode D1 is connected to the ground GND, and a cathode of the first diode D1 is connected to an arbitrary node between the CC transmitting capacitor C4 and the fifth diode D5.

The CP wake-up circuit 104 includes a CP wake-up resistor R7, a CP wake-up capacitor C3, a second diode D2, and a fourth diode D4.

The CP wake-up resistor R7, the CP wake-up capacitor C3, and the fourth diode D4 are sequentially connected in series between the CP signal terminal and the wake-up signal output terminal, wherein an anode of the fourth diode D2 is connected to the CP wake-up capacitor C3, and a cathode of the fourth diode D4 is connected to the wake-up signal output terminal.

The anode of the second diode D2 is connected to the ground GND, and the cathode of the second diode D2 is connected to an arbitrary node between the CP wake-up capacitor C3 and the fourth diode D4.

In this embodiment, the wake-up signal output terminal further includes a filter circuit formed by a fifth capacitor C5 and a ninth resistor R9, and specifically, the fifth capacitor C5 and the ninth resistor R9 are connected in parallel between the wake-up signal output terminal and the ground GND.

The CP voltage measurement circuit 102 includes a CP measurement steering diode D3, a CP voltage measurement voltage divider resistor R13, a CP voltage measurement filter resistor R14, and a CP voltage measurement filter capacitor C6.

The CP measurement guide D3, the CP voltage measurement divider resistor R13, and the CP voltage measurement filter resistor R14 are sequentially connected in series between the CP signal terminal and the ground terminal, and the CP voltage measurement filter capacitor C6 and the CP voltage measurement filter resistor R14 are connected in parallel between the CP voltage measurement terminal and the ground terminal GND.

The CP duty ratio measurement circuit 103 includes a CP duty ratio measurement voltage-dividing resistor R15, a CP duty ratio measurement control resistor R16, a CP duty ratio measurement reference resistor R17, a CP duty ratio measurement control switching element Q4, and a CP duty ratio measurement filter capacitor C7.

The CP duty ratio measurement voltage-dividing resistor R15 and the CP duty ratio measurement control resistor R16 are connected in series between the cathode of the CP measurement guide D3 and the ground GND. The anode of CP measurement lead D3 is electrically connected to the CP signal terminal.

The CP duty ratio measurement control switching element Q4 includes a fourth control terminal (not labeled), a seventh connection terminal (not labeled), and an eighth connection terminal (not labeled), the CP duty ratio measurement control switching element Q4 is in a conducting state or a blocking state under the control of the voltage received by the fourth control terminal, and when the CP duty ratio measurement control switching element Q4 is in the conducting state, the seventh connection terminal and the eighth connection terminal are electrically conducted; when the CP duty ratio measurement control switching element Q4 is in an off state, the seventh connection terminal and the eighth connection terminal are electrically disconnected.

The fourth control end of the CP duty ratio measurement control switching element Q4 is electrically connected to any node between the CP duty ratio measurement voltage-dividing resistor R15 and the CP duty ratio measurement control resistor R16. The seventh connecting end is connected to a second auxiliary power supply end (3.3V auxiliary power supply) through a CP duty ratio measurement reference resistor R17; the eighth connection terminal is connected to the ground terminal GND.

The CP duty ratio measuring filter capacitor C7 is connected between the CP signal duty ratio output terminal and the ground terminal GND.

The connection notification circuit 107 includes a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, and a third switching element Q4.

The tenth resistor R10 and the eleventh resistor R11 are sequentially connected in series between the enable signal terminal S2 and the ground terminal GND. The enable signal terminal S2 is used for outputting an enable signal EN. The enable signal EN is used for indicating that the power supply device 10a is connected with the vehicle socket In2 through the charging connection device 10b, and whether the energy storage module needs to be charged by the current vehicle-mounted charger. For example, when the enable signal EN is at a high potential, it indicates that the power supply device 10a is accurately connected to the vehicle socket In2 through the charging connection device 10b, and the vehicle-mounted charger needs to charge the energy storage module; when the enable signal EN is at a low potential, the energy storage module is represented to be charged.

The third switching element Q3 includes a third control terminal (not shown), a fifth connection terminal (not shown), and a sixth connection terminal (not shown), the third switching element Q3 is in a conducting state or a blocking state under the control of the voltage received by the third control terminal, and when the third switching element Q3 is in the conducting state, the fifth connection terminal and the sixth connection terminal are electrically conducted; when the third switching element Q3 is in the off state, the fifth connection terminal and the sixth connection terminal are electrically disconnected.

The third control terminal of the third switching element Q3 is electrically connected to any node between the tenth resistor R10 and the eleventh resistor R11. The fifth connection is connected to the cathode of the CP measurement guide D3 through a twelfth resistor R12; the sixth connection terminal is connected to the ground terminal GND.

In this embodiment, the first switching element Q1, the third switching element Q3 and the CP duty ratio measurement control switching element Q4 are all P-type MOS transistors, wherein gates of the MOS transistors are used as a first control terminal, a third control terminal and a fourth control terminal; the source electrode of the MOS tube is used as a second connecting end, a sixth connecting end and an eighth connecting end; and the drain electrode of the MOS tube is used as a third connecting end, a fifth connecting end and a seventh connecting end.

The CC wakeup switching element Q2 is a transistor, wherein the base of the transistor is used as the second control terminal, the emitter is used as the third connection terminal, and the collector is used as the fourth connection terminal.

In the present embodiment, the connection notification circuit 107 corresponds to a circuit formed by the resistor R2 and the switch S2 in fig. 4, wherein the specific corresponding relationship is as follows: the third switching element Q4 corresponds to the switch S2, and the twelfth resistor R12 corresponds to the electron R2.

The process of charge steering is described in detail in conjunction with fig. 5-7:

as shown In fig. 5 and 7, when the charging gun is connected to the vehicle, i.e., the charging interface In2 is used to connect to the second connection interface Cn2, the CC signal line is grounded through a resistor.

In the awakening stage, a loop is formed by a first normal power supply of 12V, an emitter junction from an emitter to a base in a CC awakening switch element Q2, a CC voltage dividing resistor R5, a CC delay capacitor C2 to a CC signal end, a resistor R4 and equipment ground (vehicle body ground), the CC awakening switch element Q2 is conducted and coupled through a CC transmission capacitor C4 and a fifth diode D5, so that a positive pulse awakening signal wake-up is generated on an awakening signal line CC and an awakening signal output end, and the system is awakened through the awakening signal wake-up.

The CC delay capacitor C2 is charged by the first normal power supply at 12V, and as the voltage of the CC delay capacitor C2 is gradually increased, the voltage at the base of the CC wakeup switch element Q2 is gradually increased, and when the voltage of the CC delay capacitor C2 makes the base-emitter voltage of the CC wakeup switch element Q2 smaller than the turn-on voltage Vth, the CC wakeup switch element Q2 is turned off.

With the turn-off of the second switching element Q2, the CC delay capacitor C2 discharges through the CC current limiting resistor R6, but because the resistance of the CC current limiting resistor R6 is large, the leakage current in the CC wake-up circuit 105 is very small, and the power consumption of the system during sleep is effectively reduced.

Meanwhile, as in the third step 3 in the work flow of the charge control pilot circuit corresponding to fig. 4, the system may also be woken up when the CP signal changes from high level to PWM. Specifically, the power supply control device couples the PWM signal through the CP wake-up resistor R7, the CP wake-up capacitor C3, and the fifth diode D5 through the first switch S1 and the CP signal line, and after filtering by the fifth capacitor C5, the power supply control device generates a positive pulse wake-up signal at the wake-up signal line CC and the wake-up signal output terminal, and wakes up the system through the wake-up signal wake-up.

It can be seen that, in the wake-up stage T1, besides the CP signal, the wake-up signal wake-up can be provided through the CC signal, so that the accuracy and reliability of the output of the wake-up signal wake-up are effectively improved.

In the stage of measuring the resistance of the CC, when the charging system is awakened, the auxiliary power supply is started, the first auxiliary power supply end and the second auxiliary power supply end output corresponding auxiliary voltages, the auxiliary source voltage of 12V output by the first auxiliary power supply end is divided by the grounding resistance of a CC signal line formed by the first resistor R1, the resistor R4 and the resistor RC in the figure 5, and is filtered by the second resistor R2 and the first capacitor C1 to be taken as a resistance signal of the CC and output from the measurement end of the CC voltage, the resistance signal of the CC corresponds to the measured value of the voltage of the CC, the current connection state of the charging gun and the Cable capacity of a conductive Cable in the charging gun are obtained by analyzing the measured value of the CC voltage, namely, the measurement of the CC voltage can be realized by analyzing the resistance.

In a fourth step 4 corresponding to fig. 4, an enable signal EN is provided, the enable signal EN outputs a voltage divided by the eleventh resistor R11 at a node between the tenth resistor R10 and the eleventh resistor R11 through a voltage dividing circuit formed by the tenth resistor R10 and the eleventh resistor R11, and the third switching element Q3 is turned on under the control of the voltage divided by the eleventh resistor R11, so that the twelfth resistor R12 is connected to the CP signal line and forms a to-point loop with the CP signal line, thereby causing the vehicle control apparatus to determine that the charging system is in a chargeable state.

CP voltage and duty test phase:

the CP signal is divided by a CP voltage measuring voltage dividing resistor R13, a CP voltage measuring filter resistor R14 and a CP voltage measuring filter capacitor C6, and then is output from a CP voltage measuring end as a CP voltage measuring signal. The CP voltage measurement signal represents the voltage information of the CP signal, so that the voltage information of the CP signal is sampled, and accordingly, whether the vehicle outlet In2 is connected with the power supply device 10a can be accurately judged.

The PWM signal of the CP signal controls the CP duty measurement control switching element Q4 to be in an on state or an off state through the CP duty measurement voltage-dividing resistor R15 and the CP duty measurement control resistor R16. When the CP duty ratio measurement control switching element Q4 is in a conducting state, the second auxiliary power supply carries out level conversion through the CP duty ratio measurement control switching element Q4 and the CP duty ratio measurement reference resistor R17, then obtains a CP duty ratio measurement signal after being filtered by the CP duty ratio measurement filter capacitor C7, and transmits the CP duty ratio measurement signal to the CP signal duty ratio output end. When the CP duty measurement control switching element Q4 is in the off state, the second auxiliary power supply stops outputting to the CP signal duty output terminal. The duty ratio of the CP signal can be determined through the CP duty measurement signal so as to realize the PWM measurement of the CP signal, namely the PWM signal duty ratio measurement in the CP signal. The capacity information of the power supply apparatus 10a can be determined by the duty ratio determination of the CP signal. The capacity information of the power supply apparatus 10a includes information such as a charging voltage, a charging current, and the like of the power supply apparatus 10 a.

When the vehicle-mounted charger in the charging system enters a sleep mode after charging is completed, the enable signal EN is at a low potential, the switch S1 shown in fig. 4 outputs a CP signal of a high level (12V), the auxiliary power supplies (the first auxiliary power supply and the second auxiliary power supply) are turned off, at this time, the first switch element Q1 is turned off, the first common power supply forms a loop through a Q2 emitter junction, the CC divider resistor R5, the CC current-limiting resistor R6 and the CC ground resistor, and since the resistance of the CC current-limiting resistor R6 is large, leakage current is very small, power consumption when the charging system 20 is in sleep is effectively reduced.

When the charging gun is disconnected, namely the charging interface In2 is disconnected from the second connection interface Cn2,

the CC ground resistance is disconnected, the CC delay capacitor C2 discharges through the second resistor R6, and the CC current limiting resistor R6 is large, so that the CC delay capacitor C2 can discharge quickly, and preparation is made for next charging wakeup.

The foregoing is a preferred embodiment of the present application and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application and these are considered to be within the scope of the present application.

Claims

1. A charging module comprises a charging guide circuit, a charging interface and a charger, wherein the charging interface is used for being connected with power supply equipment and comprises a power supply connecting end, a CP signal transmission end and a CC signal transmission end, the power supply connecting end is used for transmitting a first charging power supply provided by the power supply equipment, the CP signal transmission end is used for transmitting a CP signal used for controlling the working state of the charger, the CC signal transmission end is used for transmitting a CC signal representing whether the charging interface is connected with the power supply equipment or not, the charger is used for charging an energy storage module according to the first charging power supply, the charging guide circuit is connected with the charging interface and the charger, the charging guide circuit is characterized in that the charging guide circuit comprises a CP wake-up circuit and a CC wake-up circuit, the CP circuit is used for enabling the charger to be in a standby state when the charging interface is connected with the power supply equipment according to the received CP signal Awakening; the CC awakening circuit is used for awakening the charger from a standby state when the charging interface is connected with the power supply equipment according to the received CC signals.

2. The charging module of claim 1, wherein the charging steering circuit further comprises a CC resistance side circuit, a CP voltage measurement circuit, a CP duty cycle measurement circuit, and a CP charging control circuit,

the CC resistance value measuring circuit is used for measuring the ground resistance value of a CC signal transmission end, judging the connection state of the charging interface and the power supply equipment according to the ground resistance value, and determining the rated capacity of a cable of a charging connection device connected between the charging interface and the power supply equipment;

the CP voltage measuring circuit is used for judging the connection state of the charging interface and the power supply equipment;

the CP duty ratio measuring circuit is used for measuring the duty ratio of a PWM (pulse-width modulation) signal in the CP signal, the duty ratio of the PWM signal represents the maximum power supply capacity of the power supply equipment, and the duty ratio of the PWM represents the first charging power supply capacity output by the power supply equipment;

the CP charging control circuit is used for informing the power supply equipment that a charger is ready to finish, applying for stopping charging to the power supply equipment and responding to a charging stopping instruction sent by the power supply device.

3. The charging module of claim 1 or 2, wherein the CC wake-up circuit comprises a first normal power supply, a CC wake-up switch element, a CC current-limiting resistor, and a CC delay capacitor, wherein,

the CC awakening switch element comprises a second control end, a third connecting end and a fourth connecting end, the CC awakening switch element is in a conducting state or a stopping state under the control of voltage received by the second control end, and when the CC awakening switch element is in the conducting state, the third connecting end and the fourth connecting end are electrically conducted; when the CC wakeup switch element is in a cut-off state, the third connecting end and the fourth connecting end are electrically disconnected;

the second control end of the CC awakening switch element is connected with a CC signal transmission end through a CC divider resistor and a CC delay capacitor which are sequentially connected in series and used for receiving a CC signal, a third connecting end is connected with a first normal power supply, the CC current-limiting resistor is connected with the CC delay capacitor in parallel and used for providing a discharge loop for the CC delay capacitor, and a fourth connecting end is connected with an awakening signal output end;

when the charging interface is connected with the power supply equipment, the CC signal transmission end is connected with a grounding end, the CC awakening switch element is in a conducting state, and the first normal power supply outputs a positive pulse awakening signal through a fourth connecting end of the CC awakening switch element.

4. The charging module of claim 3, wherein the CC wake-up circuit further comprises a CC on-resistance connected between the first normal power supply and the CC delay capacitor, when the CC wake-up switch element is in an on state, the first normal power supply charges the CC delay capacitor through the CC on-resistance, and when a voltage obtained after the CC delay capacitor is charged is greater than a preset value, the CC wake-up switch element is in an off state, and the CC wake-up circuit stops outputting the wake-up signal.

5. The charging module according to claim 4, wherein when the charging interface is disconnected from the power supply device, the CC signal transmission terminal is disconnected from the ground terminal, the CC wakeup switch element is in an off state, and the CC delay capacitor is discharged through the CC current limiting resistor.

6. The charging module according to any one of claims 1 to 5, wherein the CP wake-up circuit comprises a CP wake-up resistor, a CP wake-up capacitor, a second diode, and a fourth diode;

the CP wake-up resistor, the CP wake-up capacitor and the fourth diode are sequentially connected in series between a CP signal end and a wake-up signal output end, wherein the anode of the fourth diode is connected with the CP wake-up capacitor, and the cathode of the second diode is connected with the wake-up signal output end;

the anode of the second diode is connected to the ground terminal, and the cathode of the second diode is connected to any node between the CP wake-up capacitor and the fourth diode;

and the PWM signal in the CP signal is transmitted to the awakening signal end through the CP awakening resistor, the CP awakening capacitor and the fourth diode and forms the awakening signal of positive pulse.

7. The charging module according to claim 6, wherein the wake-up signal output terminal is further connected to a filter circuit formed by a fifth capacitor and a ninth resistor, and the fifth capacitor and the ninth resistor are connected in parallel between the wake-up signal output terminal and the ground terminal, and configured to perform filtering on the wake-up signal.

8. The charging module according to any one of claims 1 to 7, wherein the CC resistance value measurement circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor and a first switch element, the first resistor, the second resistor and the first capacitor are sequentially connected in series between a first auxiliary power end and the ground end, the first switch element comprises a first control end, a first connection end and a second connection end, the first switch element is in a conducting state or a blocking state under the control of a voltage received by the first control end, and when the first switch element is in the conducting state, the first connection end and the second connection end are electrically conducted; when the first switch element is in a cut-off state, the first connection end and the second connection end are electrically disconnected, the first control end of the first switch element is connected to the first auxiliary power end through the third resistor, the first connection end is connected to any one node between the first resistor and the second resistor, and the second connection end is connected to the CC signal transmission end;

when the charger is awakened, a first auxiliary power supply end loads a first auxiliary power supply, the first auxiliary power supply controls the first switch element to be in a conducting state, and a cable of the charging connection device is connected to the first auxiliary power supply end through the CC signal transmission end and the first resistor;

the voltage of the cable of the charging connection device, which is obtained from the first auxiliary power supply, is filtered by the second resistor and the first capacitor and then is used as a CC resistance value signal and output from a CC voltage measurement end, and the CC voltage measurement end is connected to a node between the second resistor and the first capacitor.

9. The charging module of claim 8, wherein the CP voltage measurement circuit comprises a CP measurement steering diode, a CP voltage measurement voltage divider resistor, a CP voltage measurement filter resistor, and a CP voltage measurement filter capacitor;

the CP voltage measurement guide diode, the CP voltage measurement divider resistor and the CP voltage measurement filter resistor are sequentially connected in series between the CP signal connection end and the grounding end, and the CP voltage measurement filter capacitor and the CP voltage measurement filter resistor are connected in parallel between the CP voltage measurement end and the grounding end;

the CP signal is divided by the CP voltage measuring voltage dividing resistor, and the CP voltage measuring filter resistor and the CP voltage measuring filter capacitor are filtered to be used as a CP voltage measuring signal to be output from the CP voltage measuring end, wherein the CP voltage measuring end is connected to any node between the CP voltage measuring voltage dividing resistor and the CP voltage measuring filter resistor.

10. The charging module of claim 9, wherein the CP duty cycle measurement circuit comprises a CP duty cycle measurement voltage division resistor, a CP duty cycle measurement control resistor, a CP duty cycle measurement reference resistor, a CP duty cycle measurement control switching element, and a CP duty cycle measurement filter capacitor;

the CP duty ratio measurement voltage-dividing resistor and the CP duty ratio measurement control resistor are connected in series between the cathode of the CP measurement guide diode and the grounding end, and the anode of the CP measurement guide is electrically connected to the CP signal end;

the CP duty ratio measurement control switch element is connected with the CP duty ratio measurement divider resistor, the grounding end and the CP signal duty ratio output end;

the CP signal duty ratio output end is connected to a second auxiliary power supply end through the CP duty ratio measurement reference resistor;

the CP duty ratio measuring filter capacitor is connected between the CP signal duty ratio output end and the ground end GND;

and when the CP duty ratio measurement control switch element is in the on state, the second auxiliary power supply performs level conversion with the CP duty ratio measurement reference resistor through the CP duty ratio measurement control switch element, and transmits the converted signal to the CP signal duty ratio output end as a CP duty ratio measurement signal after being filtered by the CP duty ratio measurement filter capacitor, wherein the CP duty ratio measurement signal represents the duty ratio of the PWM signal.

11. The charging module according to claims 1 to 10, wherein when the energy storage device is charged and the charging interface is connected to the power supply device, the CP signal connection terminal stops outputting the CP signal of the PWM signal and outputs a high-level CP signal to stop outputting the wake-up signal, the charger is in a sleep state, the first auxiliary power terminal and the second auxiliary voltage terminal stop outputting the first auxiliary power source and the second auxiliary power source, the first normal power source is connected to the CC signal transmission terminal through the CC wake-up switch element and the CC current limiting resistor, and the CC current limiting resistor is configured to limit a current in the CC wake-up circuit.

12. An electric vehicle comprising an energy storage module and a charging module according to any one of claims 1-11.